package com.heima.wemedia.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.api.R;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.file.service.FileStorageService;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.WmMaterialDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.service.WmMaterialService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.util.Date;
import java.util.List;
import java.util.UUID;


@Slf4j
@Service
@Transactional
public class WmMaterialServiceImpl extends ServiceImpl<WmMaterialMapper, WmMaterial> implements WmMaterialService {

    @Autowired
    private FileStorageService fileStorageService;

    @Autowired
    private WmMaterialMapper wmMaterialMapper;

    /**
     * 图片上传
     *
     * @param multipartFile
     * @return
     */
    @Override
    public ResponseResult uploadPicture(MultipartFile multipartFile) {
        //1.检查参数
        if (multipartFile == null || multipartFile.getSize() == 0) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        //2.上传图片到minio中
        String filename = UUID.randomUUID().toString().replace("-", "");
        String originalFilename = multipartFile.getOriginalFilename();//文件初始名

        String postfix = originalFilename.substring(originalFilename.lastIndexOf("."));//提取文件后缀名

        String fileId = null;
        try {
            fileId = fileStorageService.uploadImgFile("", filename + postfix, multipartFile.getInputStream());
            log.info("上传图片到minio中，fileId：{}", fileId);

        } catch (IOException e) {
            log.error("WmMaterialServiceImpl-上传图片失败");
            e.printStackTrace();
        }

        //3.保存数据到数据库
        WmMaterial wmMaterial = new WmMaterial();
        wmMaterial.setUserId(WmThreadLocalUtil.getUser().getId());
        wmMaterial.setUrl(fileId);
        wmMaterial.setType((short) 0);
        wmMaterial.setIsCollection((short) 0);
        wmMaterial.setCreatedTime(new Date());
        save(wmMaterial);

        //4.返回结果
        return ResponseResult.okResult(wmMaterial);
    }

    /**
     * 素材列表查询
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findList(WmMaterialDto dto) {
        //1.检查参数
        dto.checkParam();

        //2.分页查询
        IPage page = new Page(dto.getPage(), dto.getSize());
        LambdaQueryWrapper<WmMaterial> lambdaQueryWrapper = new LambdaQueryWrapper<>();

        //是否收藏
        if (dto.getIsCollection() != null && dto.getIsCollection() == 1) {
            lambdaQueryWrapper.eq(WmMaterial::getIsCollection, dto.getIsCollection());
        }

        //按照用户查询
        lambdaQueryWrapper.eq(WmMaterial::getUserId, WmThreadLocalUtil.getUser().getId());

        //按照时间倒序
        lambdaQueryWrapper.orderByDesc(WmMaterial::getCreatedTime);

        page = page(page, lambdaQueryWrapper);

        //3.结果返回
        ResponseResult responseResult = new PageResponseResult(dto.getSize(), dto.getPage(), (int) page.getTotal());
        responseResult.setData(page.getRecords());
        return responseResult;
    }

    /**
     * 图片删除
     *
     * @param id
     * @return
     */
    @Autowired
    private WmNewsMaterialMapper wmNewsMaterialMapper;

    @Override
    public ResponseResult deletePi(Integer id) {
        if (id==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }


        //判断素材是否存在
        WmMaterial wmMaterial = wmMaterialMapper.selectById(id);
        if (wmMaterial == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.AP_USER_DATA_NOT_EXIST);
        }

        //判断该素材是否被引用，如果是，则返回删除失败
        List<WmNewsMaterial> wmNewsMaterials = wmNewsMaterialMapper.selectList(Wrappers
                .<WmNewsMaterial>lambdaQuery().eq(WmNewsMaterial::getMaterialId,id));
        if (wmNewsMaterials !=null && wmNewsMaterials.size()!=0){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"素材被引用，文件删除失败");
        }

        //成功删除 同时删除minio中的文件
        fileStorageService.delete(wmMaterial.getUrl());
        removeById(id);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 收藏或取消收藏
     *
     * @param id
     * @return
     */
    @Override
    public ResponseResult collectOrCancel(Integer id) {
        if (id == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        WmMaterial wmMaterial = wmMaterialMapper.selectById(id);
        if (wmMaterial == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }

        if (wmMaterial.getIsCollection() == (short)1) {
            //等于1，说明已经收藏，则取消收藏
            wmMaterial.setIsCollection((short)0);
            updateById(wmMaterial);
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
        }

        //走到这里说明wmMaterial 不为空 且 idCollection == 0
        wmMaterial.setIsCollection((short)1);
        updateById(wmMaterial);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);


    }
}
